Just above psychologyon the pyramid of sciences is ________

When Carolyn Rovee-Collier and other researchers use the conjugate reinforcement technique,

a. the babies show habituation to a stimulus that is presented repeatedly. b. the babies suck at a higher rate to produce the voice of their mother than the voice of a stranger. c. the babies kick in order to produce movement of a mobile. d. they babies receive a "peekaboo" reinforcement when they recognize a familiar object.

The third period of gestation is the:

zygotic period. embryonic period. germinal period. fetal period.